我有一个在cakephp 2.0中开发的网站,我想在两个表之间建立关系:
activity_ingredients
1 id int(10) UNSIGNED No None AUTO_INCREMENT
2 type_id tinyint(2) No None
3 activity_id int(11) No None
4 ingredient_id int(10) No None
5 created datetime
动作
1 id int(10) UNSIGNED No None AUTO_INCREMENT
2 type_id tinyint(2) No None
3 language char(2) No None
4 text varchar(100) No None
5 created datetime
我想将两个表与字段“type_id”相关联。 我已经在这种模式下完成了我的代码:
class Action extends AppModel{
public $name = 'Action'; //non utilizzata nel sito è il nome del modello alla fine per migliorare la compatibilità
public $belongsTo = array(
'ActivityIngredients' => array(
'className' => 'ActivityIngredients',
'conditions' => '',
'order' => '',
'foreignKey' => 'type_id'
)
);
}
class ActivityIngredients extends AppModel{
public $name = 'ActivityIngredients'; //non utilizzata nel sito è il nome del modello alla fine per migliorare la compatibilità
public $belongsTo = array(
'Activity' => array(
'className' => 'Activity',
'conditions' => '',
'order' => '',
'foreignKey' => 'activity_id'
),
'Ingredient' => array(
'className' => 'Ingredient',
'conditions' => '',
'order' => '',
'foreignKey' => 'ingredient_id'
)
);
public $hasMany = array(
'Action' => array(
'className' => 'Action',
'conditions' => '',
'dependent' => true,
'foreignKey' => 'type_id',
'associatedKey' => 'type_id'
)
);
}
它不会检索正确的数据..它似乎需要外键的id。 这是观点:
<?php foreach ($user['Activity'] as $activities) {
var_dump($activities);
?>
<div class="line-cnt"><div class="line">
</div>
</div>
<h2>Attività</h2>
<div class="table">
<div>
<div>Activity created</div><div><?php echo $activities['created']; ?>
</div>
</div>
<div>
<div>Actions text</div><div><?php echo $activities['Action']['text']; ?></div>
</div>
<div>
<div>ActivityIngredient ingredient_id</div><div><?php echo $activities['ActivityIngredients']['ingredient_id']; ?></div>
</div>
</div>
<?php
}
?>
控制器是一个简单的查询,查找全部并递归3到用户表格中的表格
$this->User->recursive = 3;
$user = $this->User->read();
if (empty($username) || $username != $user['User']['username']) {
$this->redirect(array ('action'=>'view',$id,$user['User']['username']));
}
$this->set('user', $user);
请帮帮我
答案 0 :(得分:2)
如果您在“activity_ingredients”表中使用“id”字段,那么首先应该将其用作另一个表中的foreignKey。
外键是关系表中与另一个表的候选键匹配的字段。
即使你试图在“actions”表中使用type_id作为外键,那么type_id在activity_ingredients表中必须是唯一的,如果是,那么你可以将ActivityIngredient模型定义为:
class ActivityIngredients extends AppModel{
public $primaryKey = 'type_id';
public $name = 'ActivityIngredients'; //non utilizzata nel sito è il nome del modello alla fine per migliorare la compatibilità
public $belongsTo = array(
'Activity' => array(
'className' => 'Activity',
'conditions' => '',
'order' => '',
'foreignKey' => 'activity_id'
),
'Ingredient' => array(
'className' => 'Ingredient',
'conditions' => '',
'order' => '',
'foreignKey' => 'ingredient_id'
)
);
public $hasMany = array(
'Action' => array(
'className' => 'Action',
'conditions' => '',
'dependent' => true,
'foreignKey' => 'type_id',
'associatedKey' => 'type_id'
)
);
}
您的行动模型将保持不变。因此,您将能够获取所需的记录。
即使您不同意在表中将“type_id”定义为外键。那么这段代码可以很好地适应你的情况。
class ActivityIngredients extends AppModel{
public $name = 'ActivityIngredients'; //non utilizzata nel sito è il nome del modello alla fine per migliorare la compatibilità
public $belongsTo = array(
'Activity' => array(
'className' => 'Activity',
'conditions' => '',
'order' => '',
'foreignKey' => 'activity_id'
),
'Ingredient' => array(
'className' => 'Ingredient',
'conditions' => '',
'order' => '',
'foreignKey' => 'ingredient_id'
)
);
public $hasMany = array(
'Action' => array(
'className' => 'Action',
'conditions' => '',
'dependent' => true,
'foreignKey' => false,
'finderQuery' => 'select * from actions as `Action` where
`Action`.`type_id` = {$__cakeID__$} '
)
);
}
我相信这会给你想要的结果。请问它是否对你不起作用。
答案 1 :(得分:-1)
在cakephp中,您可以指定primary key of a model。我相信你也可以把classname放在外键关联中。例如
'foreignKey' => 'Classname.type_id'